Turn off password login for SSH and only allow SSH keys
Cloudflare tunnel
Configure nginx to resolve the real IPs since it will now show a bunch of Cloudflare IPs. See discussion.
Use Fail2ban or Crowdsec for additional security for anything that gets past Cloudflare and also monitor SSH logs.
Only incoming port that needs to be open now is SSH. If your provider has a web UI console for your VPS you can also close the SSH port, but that’s a bit overkill.
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